India's air pollution is cutting life expectancy by three years and, in Mumbai, slum dwellers are exposed to air pollution levels that are 40 percent higher than in greener, more sparsely populated areas.

A majority of China's cities are still suffering under unhealthy levels of air pollution as the country struggles to reach its pollution goals. China's Ministry of Environmental Protection announced last week that nearly 75 percent ...

Global urban air pollution levels have increased by 8 percent, and cities are taking notice.
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